From 2009-2013, U.S.-NAFTA exports of manufactures grew by 52%, compared with 34% to the rest of the world.

U.S. manufactured exports to Canada and Mexico of $407 billion in 2013 were more than five times as large as the $76 billion of exports to China.

"The hallmark has been bold and forward-looking leadership by all three governments in the face of protectionist opposition and vested interest," said Ernie Preeg, senior advisor, Manufacturers Alliance for Productivity and Innovation (MAPI).